Ingredients

• 1/2 cup (1 stick) unsalted butter
• 2 medium onions, finely chopped
• 2 sprigs thyme
• 2 tablespoons all-purpose flour
• 1 28-ounce can crushed tomatoes
• 1/3 cup thinly sliced scallions
• 3 tablespoons heavy cream
• 1/8 teaspoon (or more) cayenne pepper
• Kosher salt, freshly ground pepper

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Instructions

1. Melt butter in a large saucepan over medium heat. Add onions and thyme; cook, stirring often, until onions are soft and translucent, about 10 minutes. Add flour; stir constantly for 3 minutes. Add tomatoes with juices; cook over medium heat, stirring occasionally, until thickened and flavors meld, about 30 minutes. Discard thyme. Stir in scallions, cream, and 1/8 teaspoon cayenne. Season to taste with salt, pepper, and more cayenne, if desired.